Here is the full list of all 33 Double achievements.
Get bad ending
Kill 15 enemies using focus
Complete day 9
Complete day 8
Uncover Lucia's lies
Die of glitch
Complete day 7
Hide pills 5 times
Kill 15 without aiming
Complete day 6
Kill 15 frozen enemies
Complete day 5
Kill 30 enemies by shooting from cover
Complete day 4
Skip 10 dialogs
Trust Louis
Complete day 3
30 headshots
Complete day 2
Die from waiting
Complete day 1
Kill an enemy with a dash while having a minimum of lucidness
Open all letters in dreams
Answer right all questions about dreams
Answer wrong all questions about dreams
Explore all things at the hospital
Take 4 pills
Complete the game without upgrades
Кill 40 enemies with dash
Get good ending
Don't uncover Lucia's lies
Answer right all questions about dreams in day 1
Do not help Louis in the shootout